单选题When making a serial connection between two Windows 2000 machines， which type of cable is needed for proper communications？（）A
RG-59 coaxial cableB
RS-232 Null Modem cableC
telephone cableD
UTP CAT5 patch cable
题目内容(请给出正确答案)
单选题
When making a serial connection between two Windows 2000 machines， which type of cable is needed for proper communications？（）
